One U.S. Air Force KC-135 assigned to the 155th Air Refueling Wing prepares to refuel aircraft participating in "NATO Days 2020" near Ostrava, Czechia, Sept. 19, 2020. Participation in events like "NATO Days" helps promote the continued importance of NATO and interoperability between NATO Allies and partners. (U.S. Air Force photo by Senior Airman Chanceler Nardone)